Mean flowfields in axisymmetric combustor geometries with swirl

Rhode, D. L.; Lilley, David G.; McLaughlin, Dennis K.

doi:10.2514/6.1982-177

Cited by 24 publications

(22 citation statements)

References 7 publications

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“…This definition of Reynolds number is general, being valid also for weak swirling flows and will be used throughout the paper. Rhode [15] verified that in the range 70000-130000 the facility he used operates in the Reynolds number-insensitive conditions from zero to high swirl number. Dellenback [21] found that mean velocities collapse to single curves from Re = 30000 to Re = 100000 for unswirled flows.…”

Section: Design and Operating Parameters Of Swirling-flow Combustorsmentioning

confidence: 99%

“…With the increase of the swirl number, axial velocity maxima are displaced from the jet axis, resulting in a double hump-shaped velocity profile [1,6]. Transition from a Gaussian to a double hump-shape is affected by the method used to generate swirl [12,16] and by the Dh/D ratio [14,15]. In particular, the presence of a swirler hub causes a small reverse-flow region in the hub wake, which may lead to a double hump-shaped velocity profile even without swirl [1,13].…”

Section: Design and Operating Parameters Of Swirling-flow Combustorsmentioning

confidence: 99%

“…Flows with weak swirl motion have been quite extensively analysed to also investigate the development of a CRZ with the increase of swirl intensity [6,9,[12][13][14][15]21]. On the other hand, the absence of recirculation zones and relatively high shear stresses make low-swirl flow fields well suited to validation of numerical models.…”

Section: Literature Review Of Low-swirl Flow Field Investigationsmentioning

confidence: 99%

“…Although many authors highlight the importance of this parameter [13,15], most of literature studies were performed at constant ER. The effects of ER on swirling flow with S > 0.3 is investigated in [19,20].…”

Section: Design and Operating Parameters Of Swirling-flow Combustorsmentioning

confidence: 99%

“…Axial velocity profiles are usually Gaussian-shaped for very low swirl number [14,15]. With the increase of the swirl number, axial velocity maxima are displaced from the jet axis, resulting in a double hump-shaped velocity profile [1,6].…”

Section: Design and Operating Parameters Of Swirling-flow Combustorsmentioning

confidence: 99%

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Effect of the Reynolds number and the basic design parameters on the isothermal flow field of low-swirl combustors

Gobbato

Masi

Cappelletti

et al. 2017

Experimental Thermal and Fluid Science

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Swirling flows through sudden expansions is a common solution adopted to stabilise the flame within combustion systems. Fuel-air mixing promoted by the swirling motion contributes also to complete the fuel oxidation and reduce pollutant emissions. (http://www.sciencedirect.com/science/article/pii/S0894177717300304) 2 extended considering original measurements performed by the authors on a laboratory combustor.The comparison shows that the flow field of low-swirl combustors is mainly affected by the Reynolds number. Among the design parameters considered, the expansion ratio is the most significant. In particular, the former controls the radial position of the velocity peak whereas the latter influences the axial decay of velocity within the jet core.

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Section: Design and Operating Parameters Of Swirling-flow Combustorsmentioning

confidence: 99%

Section: Design and Operating Parameters Of Swirling-flow Combustorsmentioning

confidence: 99%

Section: Literature Review Of Low-swirl Flow Field Investigationsmentioning

confidence: 99%

Section: Design and Operating Parameters Of Swirling-flow Combustorsmentioning

confidence: 99%

Section: Design and Operating Parameters Of Swirling-flow Combustorsmentioning

confidence: 99%

See 3 more Smart Citations

Effect of the Reynolds number and the basic design parameters on the isothermal flow field of low-swirl combustors

Gobbato

Masi

Cappelletti

et al. 2017

Experimental Thermal and Fluid Science

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A similar profile for the tangential velocity in vortex chambers

Vatistas

Song

2004

Experiments in Fluids

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K. C. Schadow et al.: Selective control of flow coherence in triangular jets 135 Krothapalli, A.; Baganoff, D.; Karamcheti, K. 1981: On the mixing of a rectangular jet. J. Fluid Mech. 107, 201-220 Marble F. E. 1985: Study of a diffusion flame in a stretched vortex. J. Combust. Sci. Technol. 45, 65-84 Mungal, M. G.; Dimotakis, P. E. 1984: Mixing and combustion with low heat release in a turbulent shear layer. J. Fluid Mech. 148, 349-382 Nikuradse, J. 1930: Turbulente Str6mung in nichtkreisf6rmigen Rohren. Ing. Arch. 1,306-332 Schadow, K. C.; Gutmark, E.; Parr, D. M.; Mahan, V. A.; Ferrell, G. B. 1987: Flow dynamics in combustion processes. J. Combust. Sci. Technol. Schadow, K. C.; Wilson, K. J.; Crum'p, J. E.; Foster, J. B.; Gutmark, E. 1984: Interaction between acoustics and subsonic ducted flow with dump. AIAA 22rid aerospace sciences meeting, AIAA Pap. 84-0530, January 9-12, 1984, Reno/NV, USA Schadow, K. C.; Wilson, K. J.; Gutmark, E. 1985: Characterization of large-scale structures in a forced ducted flow with dump. AIAA 23rd aerospace sciences meeting, AIAA Pap. 83-0080, January 14 17, 1985, Reno/NV, USA Schadow, K. C.; Wilson, K. J.; Lee, M. J.; Gutmark, E. 1984: Enhancement of mixing in ducted rockets with elliptic gas generator nozzles. AIAA Pap. No. 84-1260 Sforza, M. P.; Stasi, W. 1977: ASME PuN. 77-WA/HT27 Sforza, M. P.; Steiger, M. H.; Trentacoste, N. 1966: Studies on threedimensional viscous jets. AIAA J. 4, 800-806 Strange, P. J. R. 1981: Spinning modes in orderly jet structure and jet noise. Ph.D. Thesis, Dept. Applied Mathematical Studies, University of Leeds/UK Trentacoste, N.; Sforza, M. P. 1967: Further experimental results for three-dimensional jets. AIAA J. 5, 885-891 Winant, C. D.; Browand, F. K. 1974: Vortex pairing -the mechanism of turbulent mixing layer growth at moderate Reynolds number. J. Fluid Mech. 63, 237 255 Wygnanski, I.; Petersen, R. A.

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Experimental study and RANS calculation on velocity and temperature of a kerosene-fueled swirl laboratory combustor with and without centerbody air injection

Zhu

et al. 2015

International Journal of Heat and Mass Transfer

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Mean flowfields in axisymmetric combustor geometries with swirl

Cited by 24 publications

References 7 publications

Effect of the Reynolds number and the basic design parameters on the isothermal flow field of low-swirl combustors

Effect of the Reynolds number and the basic design parameters on the isothermal flow field of low-swirl combustors

A similar profile for the tangential velocity in vortex chambers

Experimental study and RANS calculation on velocity and temperature of a kerosene-fueled swirl laboratory combustor with and without centerbody air injection

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